import sys import yaml import urllib.parse def generate_derivation(package): name = package['description']['name'] sha = package['sha256'] version = package['version'] url = '' if 'archive_url' in package: url = package['archive_url'] else: base_url = package['description']['url'] url = f'{base_url}/packages/{name}/versions/{version}.tar.gz' return f''' {name} = fetchzip {{ sha256 = "{sha}"; url = "{url}"; stripRoot = false; extension = "tar.gz"; }}; ''' def main(): if len(sys.argv) != 4: print('Usage: lock2nix.py ') exit(1) input_file = sys.argv[1] output_file = sys.argv[2] package_name = sys.argv[3] with open(input_file, 'r') as f: data = yaml.safe_load(f.read()) with open(output_file, 'w') as f: f.write('# GENERATED BY LOCK2NIX.py\n') f.write('# DO NOT EDIT BY HAND\n') f.write('{fetchzip, runCommand} : rec {') steps = '' for package in data['packages']: try: f.write(generate_derivation(data['packages'][package])) except ex: print(f'Failed with {ex} for package {package}') print(package) source = data['packages'][package]['source'] prefix = urllib.parse.quote( data['packages'][package]['description']['url'][8:], safe='', ).replace('%2F', '%47') name = data['packages'][package]['description']['name'] version = data['packages'][package]['version'] steps += f''' mkdir -p $out/{source}/{prefix} ln -s ${{{package}}} $out/{source}/{prefix}/{name}-{version} ''' f.write(f''' pubCache = runCommand "{package_name}-pub-cache" {{}} ''{steps}''; ''') f.write('\n}') if __name__ == '__main__': main()